OutBack Power FXR International Series User manual

FXR International Series
Inverter/Charger
FXR2012E FXR2024E FXR2348E
VFXR2612E VFXR3024E VFXR3048E
Installation Manual

About OutBack Power
OutBack Power™ is a leader in advanced energy storage and conversion technology. OutBack Power
products include true sine wave inverter/chargers, batteries, maximum power point tracking charge
controllers, and system communication components, as well as circuit breakers, accessories, and
assembled systems.
Applicability
These instructions apply to OutBack Power inverter/charger models FXR2012E, FXR2024E, FXR2348E,
VFXR2612E, VFXR3024E, and VFXR3048E only.
Contact Information
Address: 3767 Alpha Way
Bellingham, WA 98226 US
A
Telephone: [phone]
Website: www.outbackpower.com
Warranty
The warranty for this product can be downloaded from
www.outbackpower.com/resources/warranty/procedures. A printed copy is available by sending a
self-addressed envelope to the above address.
Notice of Copyright
© 2015 by EnerSys. All Rights Reserved. Subject to revisions without notice. E. & O.E. .
Trademarks
Trademarks and logos are the property of EnerSys and its affiliates unless otherwise noted.
Date and Revision
September 2022, Revision D
Part Number
900-0168-01-00 Rev D

900-0168-01-00 Rev D 3
Table of Contents
Introduction .................................................................................5
Audience ................................................................................................................................... 5
Symbols Used........................................................................................................................... 5
General Safety .......................................................................................................................... 5
Welcome to OutBack Power .....................................................................................................6
Models ...................................................................................................................................... 7
Inverter Model Names .......................................................................................................................... 7
Components and Accessories.............................................................................................................. 7
Planning .....................................................................................9
Applications...............................................................................................................................9 
Input Modes........................................................................................................................................ 10
Renewable Energy ............................................................................................................................. 11
Battery Bank ....................................................................................................................................... 11
Generator ........................................................................................................................................... 15
Installation.................................................................................17
Location and Environmental Requirements ............................................................................ 17
Tools Required........................................................................................................................ 17
Mounting ................................................................................................................................. 17
Dimensions ............................................................................................................................. 18
Terminals and Ports................................................................................................................ 19
Grounding........................................................................................................................................... 20
DC Wiring................................................................................................................................ 22
AC Wiring................................................................................................................................ 25
AC Sources ........................................................................................................................................ 26
ON and OFF Wiring ................................................................................................................ 27
Accessory Wiring................................................................................................................................ 28
AUX Wiring ............................................................................................................................. 28
Generator Control............................................................................................................................... 30
AC Configurations................................................................................................................... 33
Single-Inverter .................................................................................................................................... 33
Multiple-Inverter AC Installations (Stacking) ...................................................................................... 34
Stacking Configurations ..................................................................................................................... 36
Functional Test ....................................................................................................................... 45
Pre-startup Procedures ...................................................................................................................... 45
Startup ................................................................................................................................................ 45
Powering Down .................................................................................................................................. 47
Adding New Devices .......................................................................................................................... 47
Operation ................................................................................................................................ 47
Compliance ............................................................................................................................. 48
Firmware Updates................................................................................................................... 48
Preventative Maintenance ...................................................................................................... 48
Definitions ............................................................................................................................... 49
Index........................................................................................51

4 900-0168-01-00 Rev D ©2015 EnerSys. All Rights Reserved.
Table of Contents
List of Tables
Table 1Models....................................................................................................................... 7
Table 2Components and Accessories .................................................................................. 7
Table 3Battery Bank Elements............................................................................................ 12
Table 4Ground Conductor Size and Torque Requirements................................................ 20
Table 5DC Conductor Size and Torque Requirements....................................................... 22
Table 6Terms and Definitions ............................................................................................. 49
List of Figures
Figure 1FXR Series Inverter/Charger..................................................................................... 6
Figure 2Components.............................................................................................................. 8
Figure 3Applications (Example) ............................................................................................. 9
Figure 4Dimensions and Mounting....................................................................................... 18
Figure 5Terminals, Ports, and Features............................................................................... 19
Figure 6DC Ground Lug ....................................................................................................... 21
Figure 7Chassis Ground/PE................................................................................................. 21
Figure 8Required Order of Battery Cable Hardware ............................................................ 23
Figure 9Battery Terminal Covers ......................................................................................... 23
Figure 10DC Cover Attachment ............................................................................................. 24
Figure 11Turbo Fan Wiring .................................................................................................... 24
Figure 12AC Terminals .......................................................................................................... 25
Figure 13AC Sources ............................................................................................................. 26
Figure 14AC Sources and Transfer Relay.............................................................................. 26
Figure 15ON/OFF Jumper and Connections.......................................................................... 27
Figure 16Accessory Connections........................................................................................... 28
Figure 17AUX Connections for Vent Fan (Example).............................................................. 29
Figure 18AUX Connections for Diversion (Example) ............................................................. 29
Figure 19Two-Wire Generator Start (Example)...................................................................... 31
Figure 20Three-Wire Generator Start (Example) AC Configurations ..................................... 32
Figure 21Single-Inverter Wiring.............................................................................................. 33
Figure 22Communications Manager and System Display...................................................... 34
Figure 23Example of Parallel Stacking Arrangement (Three Inverters)................................. 36
Figure 24Parallel Wiring (Four Inverters) ............................................................................... 37
Figure 25Example of Three-Phase Stacking Arrangement (Three Inverters) ........................ 38
Figure 26Example of Three-Phase Stacking Arrangement (Nine Inverters) .......................... 38
Figure 27Three-Phase Wiring (Three Inverters)..................................................................... 40
Figure 28Power Save Levels and Loads................................................................................ 41
Figure 29Power Save Priority (Parallel) ................................................................................. 43
Figure 30Power Save Priority (Three-Phase)......................................................................... 43
Figure 31AC Terminals .......................................................................................................... 46

900-0168-01-00 Rev D 5
Introduction
Audience
This book provides instructions for the physical installation and wiring of this product.
These instructions are for use by qualified personnel who meet all local and governmental code
requirements for licensing and training for the installation of electrical power systems with AC
and DC voltage up to 600 volts. This product is only serviceable by qualified personnel.
Symbols Used
WARNING: Hazard to Human Life
This type of notation indicates that the hazard could be harmful to human life.
CAUTION: Hazard to Equipment
This type of notation indicates that the hazard may cause damage to the equipment.
IMPORTANT:
This type of notation indicates that the information provided is important to the installation,
operation and/or maintenance of the equipment. Failure to follow the recommendations in
such a notation could result in voiding the equipment warranty.
NOTE:
This type of notation indicates useful information. This symbol is not always used.
MORE INFORMATION
This symbol means that more information is available in other literature. If a number is present, it refers to the
corresponding QR code near the beginning of the section. A numbered symbol is also a clickable hyperlink.
General Safety
WARNING: Limitations on Use
This equipment is NOT intended for use with life support equipment or other medical
equipment or devices.
WARNING: Reduced Protection
If this product is used in a manner not specified by FXR product literature, the product’s
internal safety protection may be impaired.
CAUTION: Equipment Damage
Only use components or accessories recommended or sold by OutBack Power or its
authorized agents.

6 900-0168-01-00 Rev D ©2015 EnerSys. All Rights Reserved.
Introduction
Welcome to OutBack Power
Thank you for purchasing the OutBack Power FXR Series Inverter/Charger. This product offers
a complete power conversion system between batteries and AC power. It can provide backup
power, sell power back to the utility grid, or provide complete stand-alone off-grid service.
Figure 1 FXR Series Inverter/Charger
NOTE:
This product has a settable AC output range. In this manual, many references to the output
refer to the entire range. However, some references are made to 230 Vac or 50 Hz. These
are intended as examples only.
1
Outback Power Technologies Intuitive Control System for Renewable Energy
o12-, 24-, and 48-volt models
oOutput power from 2.0 kVA to 3.0 kVA
oDesigned to be integrated as part of an OutBack Power
Grid/Hybrid™ system using FLEXware™ components
oBattery-to-AC inverting which delivers single-phase adjustable
output for such standards as 230 Vac, 220 Vac, or 240 Vac
(at 50 or 60 Hz)
oAC-to-battery charging (FXR systems are battery-based)
oUses battery energy stored from renewable resources
Can utilize stored energy from PV arrays,
wind turbines, etc.
FLEXmax™ charge controllers will optimize PV output
oInverter load support for a small AC source
oSell-back to utility (grid-interactive function)
Available in 24- and 48-volt models
oRapid transfer between AC source and inverter output
with minimal delay time
oUses the MATE3s™ System Display and Controller for user interface as part of a
Grid/Hybrid system
oSupports the OPTICS RE™ online tool1for a cloud-based remote monitoring and
control application
Requires the MATE3s system display
oUses the HUB10.3™ Communications Manager for stacking as part of a
Grid/Hybrid system
Stackable in parallel and three-phase configurations

900-0168-01-00 Rev D 7
Introduction
Models
Vented FXR (VFXR) models have an internal fan and use outside air for cooling. On average,
VFXR models have higher power ratings than FXR models due to their greater cooling capabilities.
Sealed FXR models have an internal fan, but do not use outside air for cooling. To
compensate, sealed models are also equipped with the OutBack Turbo Fan assembly, using
external air to remove heat from the chassis. (Vented FXR models are not equipped with the
Turbo Fan and cannot use it.)
IMPORTANT:
All models, sealed or vented, must be installed indoors.
Table 1 Models
Model Type Power Battery Application
FXR2012E Sealed 2.0 kVA 12 Vdc Off-grid, backup
VFXR2612E Vented 2.6 kVA 12 Vdc Off-grid, backup
FXR2024E Sealed 2.0 kVA 24 Vdc Off-grid, backup, grid-interactive
VFXR3024E Vented 3.0 kVA 24 Vdc Off-grid, backup, grid-interactive
FXR2348E Sealed 2.3 kVA 48 Vdc Off-grid, backup, grid-interactive
VFXR3048E Vented 3.0 kVA 48 Vdc Off-grid, backup, grid-interactive
Inverter Model Names
FXR series model numbers use the following naming conventions.
oThe model number includes “FXR” as the inverter series. “R” indicates that the FXR was designed
for renewable applications. Off-grid and grid-interactive functions are integrated in the same inverter.
oVented models are preceded with “V”, as in “VFXR3048E”. If a model number does not begin with
“V”, it is a sealed model and is equipped with a Turbo Fan. This is not indicated otherwise.
oThe first two digits show the wattage of that model. For example, “FXR2012E” is 2000 watts.
oThe second pair of digits shows the inverter’s nominal DC voltage. For example, “FXR2024E” is
24 volts.
oThe model number is followed by “E”. This designates the inverter’s output as nominally 230 Vac
(used in Europe, Africa, and other regions).
Components and Accessories
Table 2 Components and Accessories
Components to be Installed Accessories Included
Battery Terminal Cover, red “WARNING ELECTRICAL SHOCK” sticker
Battery Terminal Cover, black Silicone Grease Packet
AC Plate
DC Cover (DCC) or Turbo Fan
Remote Temperature Sensor (RTS)

8 900-0168-01-00 Rev D ©2015 EnerSys. All Rights Reserved.
Introduction
Figure 2 Components
DCC (DC Cover)
This covers the DC terminal area on vented inverters. The
DCC provides space to mount other components such as a
DC current shunt.
AC Plate
This plate is used for installations which do not utilize
OutBack Power’s optional FLEXware conduit boxes. The
knockouts are used to install strain relief for flexible cable.
NOTE: This plate is not to be connected to conduit.
Battery Terminal Cover
These protect the terminals from accidental contact.
They are made of stiff plastic with a snap-on design.
A
lways keep covers installed during normal operation.
Turbo Fan Cover
Included in place of the DCC on sealed inverters.
Convectively cools chassis with the external Turbo Fan to allow
maximum power.
NOTE: Do not install the Turbo Fan on a vented inverter.
NOTE:The DC Cover or Turbo Fan does not replace the battery
terminal covers. These covers must be installed in addition to the
DCC or fan.

900-0168-01-00 Rev D 9
Planning
Applications
OutBack Power inverter/chargers are designed to use a battery bank to store energy. They
work together with power from the utility grid or from renewable energy sources, such as
photovoltaic (PV) modules, wind turbines, and other renewable sources. These sources charge
the battery, which in turn is used by the inverter.
The FXR inverter’s settings can be changed to accommodate many applications.
These include off-grid, backup, and grid-interactive applications.
The FXR inverter has one set of terminals for a single AC source. However, it can use two
different AC sources when an external transfer switch is installed. The inverter can be
independently programmed for each source. It is common to use utility grid power and a gas or
diesel generator. Other combinations of AC sources are possible.
Figure 3 Applications (Example)
IMPORTANT:
This product is designed and tested for stationary applications only. It is not listed or warranted
for mobile use.
NOTE:
In Figure 3, the inverter uses a bidirectional AC input to sell power back to the utility grid. The
power being delivered to the grid (labeled “AC Out”) is excess AC power not being used by the
AC loads. Selling requires an inverter/charger with Grid Tied mode available and active.
1
OR
AC IN*
AC IN*
Loads
AC OUT
DC OUT
Load Support
Battery
Charging
AC or PV
PV Array
DC IN
AC OUT
PV Harvest
Utility Grid
*Two sources utilizing an AC selector switch on one input
AC Generator
Charge
Controller
Batter
y

10 900-0168-01-00 Rev D ©2015 EnerSys. All Rights Reserved.
Planning
oGenerator: This mode enables the battery charging function to tolerate a wider range of generator
performance and waveform irregularities than other modes. The inverter can use generator power
even when the generator is substandard.
oSupport: This mode is intended for systems using utility grid or a generator. In some cases the
amount of current available from the source is limited due to size, wiring, or other reasons. If large
loads need to be run, the FXR inverter augments (supports) the AC source. The inverter uses battery
power and additional sources to ensure that the loads receive the power they demand.
oGrid Tied: This mode is intended for grid-interactive systems that are net metered. Once the battery
is charged and protected loads are served, the inverter will export power to the utility grid.
NOTE: This mode is only available in 24-volt and 48-volt models.
oUPS: This mode is intended for systems primarily intended to maintain power to the loads with
minimal interruption when switching between AC input and batteries. The response speed has been
increased so that if an AC disconnect occurs the response time will be minimized.
oBackup: This mode is intended for systems that have the utility grid or a generator available, but
do not have specialty requirements such as selling or support. The AC source will flow through the
inverter to power the loads unless power is lost. If power is lost, then the inverter will supply energy
to the loads from the battery bank until the AC source returns.
oMini Grid: This mode is intended for systems that have the utility grid as an input and a sizable
amount of renewable energy. It behaves like an off-grid system using the utility grid as a backup
generator. The system will use the renewable energy until the battery voltage falls to a specified low
level. When this occurs, the inverter will connect to the utility grid to power the loads. The inverter
will disconnect from the utility grid when the batteries are sufficiently recharged.
oGridZero: This mode is intended for systems that have the utility grid as an input and a sizable
amount of renewable energy. The loads will remain connected to the utility grid, but will restrict the
grid use except when no other power is available. The default power sources are the batteries and
renewable energy, which attempt to “zero” the use of the AC source. The batteries are discharged
and recharged (from renewable sources) while remaining grid-connected. This mode does not allow
the inverter to charge batteries or sell.
Input Modes
The FXR inverter has many modes of operation. See the FXR International Series
Inverter/Charger Operator’s Manual for additional information on these modes, including
reasons and considerations for using each mode.
2
The modes determine how the inverter interacts with an AC source. Each mode has functions
and priorities that are intended for a designated application. Each of the inverter’s input
selections can be set to a different operating mode to support different applications.
See the FXR Series Inverter/Charger Operator’s Manual for additional information on these
modes, including the reasons and considerations for using each mode.
Programming
Selection of the input modes and all other inverter programming is performed using a system
display such as the MATE3s. This product can customize a wide range of parameters.
1
2
13

900-0168-01-00 Rev D 11
Planning
Renewable Energy
The FXR inverter cannot connect directly to PV (solare, wind turbines, or other unregulated DC
sources. The batteries are the inverter’s primary source of power.
A renewable energy source is always treated as a battery charger, even if all of its power is
used immediately by the inverter. The renewable source must have a charge controller, or
some other regulation method, to prevent overcharging. OutBack Power’s FLEXmax family of
charge controllers can be used for this purpose, as can other products.
Battery Bank
When planning a battery bank, consider the following:
oCables: Recommendations for battery cable size and length are shown on page 22. The maximum
length will determine the placement of the battery bank. Local codes or regulations may apply and
may take priority over any recommendations by OutBack Power.
oNominal Voltage: These inverters are designed to work with specific battery bank voltages, which
are different depending on inverter model. Before constructing a battery bank, check the inverter
model and confirm nominal battery voltage.
oBattery Type: The FXR inverter/charger uses a three-stage charge cycle.
The default inverter/charger settings assume a deep-cycle stationary lead-acid battery, such as
OutBack Power’s EnergyCell PLR or NorthStar Blue+ series batteries. The inverter’s settings
can be adjusted for other advanced battery technologies.
Consult the documentation for the specific batteries used in the system to ensure that the settings
are appropriate.
•The OutBack Power website contains a list of supported lithium-ion battery models.
3
CAUTION: Battery Damage
OutBack Power does not approve custom applications, including installation of lithium-ion
batteries that have not been lab-tested and published as installable with OutBack Power
equipment. OutBack Power only supports batteries that have been certified and published
for use with this product. See below. Supported batteries are assumed to be new (not
repurposed, purchased used, etc), covered under manufacturer’s warranty for the
intended application, and fully compliant to all local and national regulatory requirements.
Please note that Outback Power does not claim responsibility for any damage done by or
to batteries that are deployed using the information found in this notice.
IMPORTANT: Supported Batteries
The list linked above includes batteries that have been reviewed and tested by OutBack
Power personnel and whose manufacturers have provided specific guidance on
equipment settings and limitations. Use of batteries not on this list — including unlisted
battery models from the same manufacturers — is at the risk of the installer and host
site and may result in the product warranty being void. This remains the case regardless
of any technical advice or assistance that may be provided by OutBack Power, its
personnel, or representatives.
Please refer to the application notes and any manufacturer recommendations for
recommended settings. Note that inclusion on this list does not constitute an
endorsement of these battery products and that not all combinations carry the safety
listings required by some permitting authorities.
PLEASE NOTE THAT OUTBACK POWER DOES NOT CLAIM RESPONSIBILITY FOR
ANY DAMAGE DONE BY OR TO BATTERIES THAT ARE DEPLOYED USING THE
INFORMATION FOUND IN THIS NOTICE.

12 900-0168-01-00 Rev D ©2015 EnerSys. All Rights Reserved.
Planning
oCharger Settings and Maintenance: A vented battery enclosure may be required by electric
code and is usually recommended for safety reasons. It may be necessary to use a fan to ventilate
the battery enclosure.
Batteries must be regularly maintained according to the instructions of the battery manufacturer.
IMPORTANT:
Battery charger settings need to be correct for a given battery type. Always follow battery
manufacturer recommendations. Making incorrect settings, or leaving them at factory
default settings, may cause the batteries to be undercharged or overcharged.
CAUTION: Hazard to Equipment
Batteries can emit vapors which are corrosive over long periods of time. Installing the
inverter in the battery compartment may cause corrosion which is not covered by the
product warranty. (Sealed batteries may be an exception.)
oBank Size: Battery bank capacity is measured in amp-hours. Determine the required bank
specifications as accurately as possible, beginning with the items below. This avoids
underperformance or wasted capacity.
These ten items are obtainable in different places, summarized in Table 3. Some of the information is
specific to the site or application. Some can be obtained from the battery manufacturer. Information
on products is available from OutBack Power or its dealers.
A.Size of load:
B.Daily hours of use:
C.Days of autonomy:
D.Application: This often helps define or prioritize the previous three items. Off-grid systems often
require enough capacity to last for an extended period before recharging. Grid-connected
systems frequently need only enough capacity for short-term backup during outages.
Table 3 Battery Bank Elements
Item Source of information
A. Load Size Site-specific
B. Daily Hours Site-specific
C. Days of Autonomy Site-specific
D. ApplicationSite-specific
E. Conductor Efficiency Site-specific
F. Inverter Efficiency Inverter manufacturer
G. System Vdc Inverter manufacturer
H. Battery Vdc Battery manufacturer
I. Capacity Ah Battery manufacturer
Example:
ModelDischarge in Hours
1234820
200PLR 86.5 119 144 177 191.5 203.8
NSB190 134.9 152.2 160.7 166.2 179.5 202.4
J. Maximum DoD Battery manufacturer
These are the most basic
and essential factors used
to determine bank size.

900-0168-01-00 Rev D 13
Planning
E. Conductor efficiency: Wire size and other factors
will waste power due to resistance and voltage drop.
Typical acceptable efficiency is 96 to 99%.
F.Inverter efficiency: FXR specifications list “Typical
Efficiency” to help estimate operating loss.
G.System DC voltage: Each inverter model requires a specific DC voltage to operate.
H.Battery voltage: Most individual battery voltages are less than the system DC voltage. The
batteries may need to be placed in series to deliver the correct voltage.
I.Capacity: Battery capacity, which is measured in ampere-hours (amp-hours or Ah), is not usually
a fixed number. It is specified based on the rate of discharge. For example, the EnergyCell
200PLR is rated at 177 Ah when discharged at the 4 hour rate (to terminal voltage 1.75 volts per
cell or Vpc). This is a high rate of discharge that would hypothetically drain the battery in 4 hours.
The same battery is rated at 203.8 Ah when used at the 20 hour rate.
In general, use the 8-hour capacity or less. The larger the load, the more severe the discharge.
In these cases conservative values with faster discharge times from the table (for example, the 2-
or 3-hour capacity) are better.
To choose accurately, the best method is to divide each Ah figure by the discharge in hours. (An
example from Table 3 for EnergyCell 200PLR would be 144 ÷ 3 hours = 48 Adc.) If the number is
equal or greater than the load size (in DC amperes), that column can be used as the capacity.
NOTES:
The battery’s selected rated capacity may have little to do with the actual hours of use;
this figure simply reflects the rate of discharge.
Capacity ratings are for batteries at 25°C. Capacity is reduced at cooler temperatures.
J. Maximum depth of discharge (DoD): Most batteries cannot be discharged below a certain level
without damage. The bank requires enough total capacity to keep this from happening. DoD is
usually described as a percentage, although it is shown as a decimal in calculations.
To Calculate Minimum Battery Bank Size (refer to previous page for letter designations):
1.The load size, item A, is measured in watts. Compensate this figure for efficiency loss. Multiply the
conductor efficiency by the inverter efficiency [E× F]. (These items are represented as percentages,
but may be displayed as decimals for calculation.) Divide item Aby the result.
2.Convert the compensated load into amperes (Adc). Divide the step 1result by the system voltage (G).
3.Determine the best battery capacity (I) by dividing each rated capacity by the time in hours (as shown
in Table 3). This is the estimated discharge rate at that battery capacity. The number is usable if the
step 2result (the actual load rate) does not exceed it. Choose the closest (or smaller) rated amp-
hour capacity.
4.Determine the daily load consumption in ampere-hours (Ah). Multiply the step 2result by the daily
usage hours (item B).
5.Adjust the total for required days of autonomy (the days the system must operate without recharging)
and the maximum DoD. Multiply the step 4result by Cand divide by J.
The result is the total amp-hour capacity required for the battery bank.
6.Determine the number of parallel battery strings required. Divide the Ah figure from step 5by the
individual battery capacity (I) determined in step 3. Round the result to the next highest whole number.
7.Determine the total number of batteries required. Divide the system voltage by the battery voltage
[G÷ H]. Multiply the result by the step 6result.
The result is the total required quantity of the chosen battery model.
Any losses are essentially amp-hour
capacity that the system cannot use.
The battery bank size can be
increased to account for losses.

14 900-0168-01-00 Rev D ©2015 EnerSys. All Rights Reserved.
Planning
EXAMPLE #1
A. Backup loads: 1.0 kW (1000 W)
B. Hours of use: 8
C. Days of autonomy: 1
D. Grid-interactive system
(FXR2348E inverter)
E. Conductor efficiency: 98% (0.98)
F. Inverter efficiency: 93% (0.93)
G. System voltage: 48 Vdc
H. Batteries: EnergyCell 220PLR (12 Vdc)
I. Capacity at 8-hour rate: 191.5 Ah
J. Maximum DoD: 80% (0.8)
EXAMPLE #2
A. Backup loads: 720 W)
B. Hours of use: 3
C. Days of autonomy: 3
D. Off-grid system
(VFXR3024E inverter)
E. Conductor efficiency: 97% (0.97)
F. Inverter efficiency: 92% (0.9)
G. System voltage: 24 Vdc
H. Batteries: NorthStar Blue+ NSB190FT
(12 Vdc)
I. Capacity at 3-hour rate: 160.7 Ah
J. Maximum DoD: 50% (0.5)
1. A÷ [E× F] 1000 ÷ (0.98 × 0.93) = 1097.2 W
2. 1÷ G1097.2 ÷ 48 = 22.9 Adc
3. I= Ah ÷ hours 191.5 ÷ 8 = 23.9 Adc (larger than 22.9;
Compare to 2 this means 191.5 Ah is usable)
4. 2× B22.9 × 8 = 182.9 Ah
5. [4× C] ÷ J[182.9 × 1] ÷ 0.8 = 228.6 Ah
6. 5÷ I228.6 ÷ 191.5 = 1.19 (rounded to 2)
7. [G÷ H] × 6[48 ÷ 12] × 2 strings = 8 batteries
1.
A
÷ [E× F] 720 ÷ [0.97 × 0.9] = 801.8 W
2. 1÷ G824.7 ÷ 24 = 34.4 Adc
3. I= Ah ÷ hours 160.7 ÷ 3 = 53.5 Adc (larger than 34.4;
Compare to 2 this means 160.7 Ah is usable)
4. 2× B34.4 × 3 = 103.1 Ah
5. [4× C] ÷ J[103.1 × 3] ÷ 0.5 = 618.6 Ahr
6. 5÷ I618.6 ÷ 160.7 = 3.85 (rounded to 4)
7. [G÷ H] × 6[24 ÷ 12] × 4 strings = 8 batteries

900-0168-01-00 Rev D 15
Planning
Generator
oFXR inverters can accept power from a single-phase generator that delivers clean AC power in the
range of voltage and frequency specified for that model.
Inverters stacked for three-phase output can work with three-phase (230V/400Y) generators.
oThe inverter/charger can provide a start signal to control an automatic start generator. If automatic
generator starting is required, the generator must be an electric-start model with automatic choke. It
should have two-wire start capability. For other configurations, additional equipment may be required.
oIn any configuration, the inverter may need to be programmed using the system display.
Perform all programming according to the specifications of the generator and the required operation
of the inverter. Parameters to be program med may include generator size, automatic starting
requirements, and potential fluctuations in generator AC voltage.
oA generator that is to be installed in a building usually should not have a bond between the neutral
and ground connections. The generator should only be bonded if there is a specific need. Local or
national codes may require the neutral and ground to be bonded at the main electrical panel. See
page 20 for more information on neutral-ground bonding.
Generator Sizing
A generator should be sized to provide enough power for all expected use.
oA conservative estimate assumes that both the loads and charging will be maximized at the same
time. However, this can result in an oversized generator with inefficient operation.
oA smaller generator may be used for average loads with the inverter’s Support mode providing
support from the batteries during peak loads. The loads can be manually disconnected while the
batteries are charging.
oIn general, the generator should be sufficiently powerful to handle all necessary load surges.
Other considerations:
oAvailable generator power may be limited by ratings for circuit breakers and/or generator connectors.
oMany generators may not be able to maintain AC voltage or frequency for long periods of time if they
are loaded more than 80% of rated capacity. This statement may not apply to inverter-based
generators, which typically have more stable voltage and frequency regulation.
1

16 900-0168-01-00 Rev D ©2015 EnerSys. All Rights Reserved.
Planning
NOTES:

900-0168-01-00 Rev D 17
Installation
Location and Environmental Requirements
FXR and VFXR series inverter/chargers must be located indoors or in a weatherproof enclosure.
They are not designed for exposure to water, salt air, or excessive wind-blown dust and debris.
oThe inverter can often be mounted in any position or orientation. When inverters are installed with a
FLEXpower system, the system must be installed in the upright orientation due to the requirements of
the circuit breakers.
oAny inverter will perform more efficiently in locations offering plenty of air circulation. The
recommended minimum clearance is 5 cm (2 inches) on all sides of the inverter.
oThese inverters will operate normally in a range of –20°C to 50°C (–4°F to 122°F). Maximum output
will begin to decline at ambient temperatures above 25°C (77°F).
oThe allowable temperature range for storage is –40°C to 60°C (–40°F to 140°F).
oThese inverters carry an Ingress Protection (IP) rating of 20 and a Relative Humidity (RH) rating of
93% (non-condensing).
oInverter specifications are listed in the FXR International Series Inverter/Charger Operator’s Manual.
Tools Required
The following tools may be required for this installation:
oWrench and socket sets; should include
torque and ratchet wrenches
oWire cutters/strippers
Mounting
oOne person can install the FXR inverter, but installation may be easier with two people.
oThe unit has four mounting holes, one in each corner. (See Figure 4.) Use fasteners in all corners.
oDue to the variance in other methods, OutBack Power only endorses the use of FLEXware mounting
products. Use M6 × 20 mm machine screws, one per corner, to attach the inverter to the plate.
Follow the instructions with each mounting system.
oMount the plate on a flat, solid mounting surface. Ensure the surface is strong enough to handle
three times the total weight of all the components. If using a FLEXware Mounting Plate, avoid large
air gaps behind the plate. These can result in louder mechanical noise during inverting or charging.
oMount and secure each component before attaching any wiring.
oWhen the inverter is used with other metal chassis, make sure that all chassis are grounded
appropriately. (See the grounding instructions on page 20.) Grounding other chassis may involve
metal-to-metal contact, or separate ground wires.
IMPORTANT:
Use correct fasteners to secure the inverter to the mounting surface, regardless of the
type of surface. OutBack Power cannot be responsible for damage to the product if it is
attached with inadequate fasteners.
2
oInsulated screwdriver set (flat and Phillips)
oLong-nose pliers
oHigh-resolution voltmeter

18 900-0168-01-00 Rev D ©2015 EnerSys. All Rights Reserved.
Installation
Dimensions
Figure 4 Dimensions and Mounting
Height
with Turbo
33 cm (13”)
Width
21 cm (8.25”)
Length 41 cm (16.25”)
Height
with DCC
30.5 cm (12”)
Placement of Mounting Fasteners
21

900-0168-01-00 Rev D 19
Installation
Terminals and Ports
Figure 5 Terminals, Ports, and Features
NOTE:
The I
NVERTER
O
N
/O
FF
jumper is installed to the O
N
position during manufacture, but the FXR
inverter is given an external OFF command at the same time. Its initial state is Off.
DC and AC
GROUND TERMINALS
These terminals connect to a
grounding system for both
batteries and AC. See page
20 for instructions.
INVERTER ON/OFF
These terminals receive wires for a manual
on/off switch to control the inverter.
ON/OFF JUMPER
The jumper alongside these terminals
overrides them and turns the inverter on.
(See page 27 for instructions.) With the
jumper installed, a switch cannot turn the
inverter off, but the system display can turn it
off or on. The system display cannot turn it
on if the jumper is not installed.
DC TERMINALS
These terminals connect to the
battery cables and the DC system.
See page 22 for instructions.
CONTROL WIRING TERMINAL BLOCK
These terminals receive control wires for a
variety of functions including generator control.
See pages 28 and 30 for instructions and the
Operator’s Manual for more information.
This part can be unplugged from the AC board
for convenience. While installed, keep screws
tight and the block itself secured tightly to the
AC board to prevent malfunction. XCT+/XCT-
Non-operational
terminals. Do not
connect anything to them.
MATE/HUB and RTS
PORTS
These ports receive the RJ45
and RJ11 plugs from the
system display and Remote
Temp Sensor. See page 27
for instructions.
The ports are mounted
sideways. When viewed from
the left side, they appear as
shown below.
AC TERMINAL BLOCK
These terminals receive AC
input and output wires. See
page 25 for instructions.
LED INDICATORS
These indicators display the inverter status and battery voltage.
The three BATTERY LED indicators (green, yellow, and red) are based
on DC voltage. They provide a very general idea of battery state.
The green INVERTER LED indicator shows if the inverting function is on.
The yellow AC INLED indicator shows if an AC source is present.
The red ERROR LED indicator shows either a Warning or an Error. A
Warning is an alert for a problem that is not severe enough for
shutdown. An Error usually accompanies inverter shutdown.
See the Operator’s Manual for more information.
AUX OUTPUT (AUX+/AUX-)
These terminals deliver 12 Vdc up to 0.7
amps (8.4 watts). The output can be
switched on and off for many functions. The
default function is to drive a cooling fan or the
Turbo Fan. See page 28 for details.
The functions for the AUX output can be
programmed using the system display.
AUX LED INDICATOR
Orange LED indicator turns on
when 12 Vdc output is present.

20 900-0168-01-00 Rev D ©2015 EnerSys. All Rights Reserved.
Installation
Wiring
It will be necessary to remove knockouts from the AC Plate to run wires. The AC Plate has
one knockout of ½” size and two knockouts of ¾” size. Install appropriate bushings to protect
the wires.
Use copper wire only. Wire must be rated at 75°C or higher.
Grounding
WARNING: Shock Hazard
This unit meets the IEC requirements of Protection Class I.
The unit must be connected to a permanent wiring system that is grounded according to
the IEC 60364 TN standard.
The input and output circuits are isolated from ground. The installer is responsible for
system grounding according to all applicable codes.
For safety, the neutral and ground conductors should be mechanically bonded. OutBack
Power does not bond these conductors within the inverter. Some codes require the bond
to be made at the main panel only. Make sure that no more than one bond is present in
the AC system at any time.
WARNING: Shock Hazard
For all installations, the negative battery conductor should be bonded to the grounding system
at only one point. If the OutBack Power GFDI is present, it can provide the bond.
IMPORTANT:
Most OutBack Power products are not designed for use in a positive-grounded system. If it is
necessary to build a positive-grounded system with OutBack Power products, see the Positive
Grounding applications note at www.outbackpower.com.
Table 4 Ground Conductor Size and Torque Requirements
Terminal
Location Minimum Conductor Size Torque Requirements
Central AC Terminals 6 mm² or #10 AWG (0.009 in²) 2.8 Nm (25 in-lb)
DC Box Lug 16 mm² or #6 AWG (0.025 in²) 5.1 Nm (45 in-lb)
Table 4 contains OutBack Power’s recommendations for minimum safe cable sizes.
Other codes may supersede these recommendations. Consult applicable codes for final
size requirements.